US11277780B2 - Service setup method and device - Google Patents

Service setup method and device Download PDF

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US11277780B2
US11277780B2 US16/282,535 US201916282535A US11277780B2 US 11277780 B2 US11277780 B2 US 11277780B2 US 201916282535 A US201916282535 A US 201916282535A US 11277780 B2 US11277780 B2 US 11277780B2
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service
network device
requirement
cell
radio channel
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US20190191351A1 (en
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Weiwei CHONG
Xiaobo Wu
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H04W36/385—Reselection control by fixed network equipment of the core network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H04B17/327—Received signal code power [RSCP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H04W72/087—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure

Definitions

  • This application relates to the field of communications technology, and in particular, to a service setup method and a device.
  • a voice service in a Long Term Evolution (LTE) network is referred to as a voice over Long Term Evolution (VoLTE) service.
  • VoIP voice over Long Term Evolution
  • more operators start to use VoLTE for commercial purposes, and more user equipment UE) can support the VoLTE service.
  • Embodiments of this application provide a service setup method and a device, to resolve a problem that because a radio resource is forcibly allocated to UE after a service setup request is received, a service cannot be normally executed or execution of a service leads to relatively poor user experience.
  • a service setup method includes: receiving, by an access network device, a first setup request from a first core network device or a first service application server, where the first setup request carries a service requirement of a first service, and the service requirement of the first service is used to indicate, to the access network device, a radio channel quality requirement for user equipment UE to execute the first service; sending, by the access network device, a first setup response to the first core network device or the first service application server, where the first setup response is used to notify the first core network device or the first service application server that the access network device accepts the first setup request; and when the access network device determines that radio channel quality of a first cell of a first network in which the UE is located does not satisfy the service requirement of the first service, sending, by the access network device, a first notification message to the first core network device or the first service application server, where the first notification message is used to notify the first core network device or the first service application server that the radio channel quality of the first cell does not
  • the access network device may use the received service requirement information as an admission threshold of service setup.
  • the access network device when radio signal quality of the cell in which the UE is located does not satisfy the service requirement, the access network device notifies the service application server, so that the service application server makes a corresponding adjustment; or the access network device may hand over the UE to another cell that can satisfy the service requirement, to complete service setup in the another cell.
  • the access network device may use, as an admission threshold of service setup, a service requirement that is of a to-be-set up service and that is from the service application server, thereby avoiding prior-art problems such as an error and inflexibility caused by determining an admission threshold only based on an empirical value.
  • a network side may adjust the service requirement depending on an actual network status, or hand over the UE to another cell, to ensure that after a service is set up, the service can be normally executed and user experience during the execution of the service is improved.
  • the access network device may send the first setup response to the first core network device or the first service application server after determining that the radio channel quality of the first cell satisfies the service requirement of the first service.
  • the method in this embodiment of this application may further include: determining, by the access network device, that the radio channel quality of the first cell satisfies the service requirement of the first service.
  • the access network device may allocate a radio resource to the first service after receiving the first setup request and determining that the radio channel quality of the first cell satisfies the service requirement of the first service.
  • the method in this embodiment of this application may further include: allocating, by the access network device, the radio resource to the first service.
  • the service application server may indicate, by using indication information (for example, first indication information) included in the service requirement of the first service, the access network device to: send the first notification message to the core network device or the service application server when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • indication information for example, first indication information
  • the “sending, by the access network device, a first notification message to the first core network device or the first service application server” may include: if the access network device determines that the service requirement of the first service includes the first indication information, sending the first notification message to the first core network device or the first service application server.
  • the first indication information is used to indicate the access network device to: send the first notification message to the first core network device or the first service application server when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the service application server may indicate, by using indication information (for example, second indication information) included in the service requirement of the first service, the access network device to: hand over the UE to the second cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • indication information for example, second indication information
  • the “handing over, by the access network device, the UE to a second cell of the first network” may include: if the access network device determines that the service requirement of the first service includes the second indication information and the access network device determines that the second cell whose radio channel quality satisfies the service requirement of the first service exists, handing over, by the access network device, the UE to the second cell.
  • the second indication information is used to indicate the access network device to: hand over the UE to the second cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the service application server may indicate, by using indication information (for example, third indication information) included in the service requirement of the first service, the access network device to: hand over the UE to the third cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • indication information for example, third indication information
  • the “handing over, by the access network device, the UE to a third cell of a second network” may include: if the access network device determines that the service requirement of the first service includes the third indication information and the access network device determines that the third cell whose radio channel quality satisfies the service requirement of the first service exists, handing over, by the access network device, the UE to the third cell.
  • the third indication information is used to indicate the access network device to: hand over the UE to the third cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the access network device may perform “sending the first notification message to the core network device or the service application server”, “handing over the UE to the second cell”, or “handing over the UE to the third cell” according to an indication of the indication information in the service requirement of the first service when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the access network device may determine, in a manner of sending a measurement control command to the UE, that the radio channel quality of the first cell does not satisfy the service requirement of the first service. Specifically, after the “sending, by the access network device, a first setup response to the first core network device or the first service application server”, the method in this embodiment of this application may further include: delivering, by the access network device, a first measurement control command to the UE.
  • the first measurement control command is used to indicate the UE to measure the radio channel quality of the first cell, and send a first measurement report to the access network device when the radio channel quality of the first cell does not satisfy the service requirement of the first service, and the first measurement report is used to indicate, to the access network device, that the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the access network device may further receive a service setup request used to indicate the access network device to create another service.
  • the method in this embodiment of this application may further include: receiving, by the access network device, a second setup request from a second core network device or a second service application server, where the second setup request carries a service requirement of a second service, and the service requirement of the second service is used to indicate, to the access network device, a radio channel quality requirement for the UE to execute the second service; determining, by the access network device, that the service requirement of the second service is higher than the service requirement of the first service; and delivering, by the access network device, a second measurement control command to the UE.
  • the second measurement control command is used to indicate the UE to measure the radio channel quality of the first cell, and send a second measurement report to the access network device when the radio channel quality of the first cell does not satisfy the service requirement of the second service, and the second measurement report is used to indicate, to the access network device, that the radio channel quality of the first cell does not satisfy the service requirement of the second service.
  • the access network device may directly compare the service requirement of the first service with the service requirement of the second service, and when the service requirement of the second service is higher than the service requirement of the first service, determine, in a manner of delivering a measurement control command to the UE, whether the radio channel quality of the first cell satisfies the service requirement of the second service. If the service requirement of the second service is lower than the service requirement of the first service, the access network device does not need to continue to determine whether the radio channel quality of the first cell satisfies the service requirement of the second service, but directly uses the service requirement of the first cell as an admission threshold of service setup, to set up the second service.
  • the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service may not exist.
  • the method in this embodiment of this application may further include: if the access network device determines that the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist, sending, by the access network device, a second notification message to the first core network device or the first service application server.
  • the second notification message is used to notify the first core network device or the first service application server that the radio channel quality of the first cell does not satisfy the service requirement of the first service and the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist.
  • the access network device may send the second notification message to the service application server to indicate that “the radio channel quality of the first cell does not satisfy the service requirement of the first service, and the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist”, so that the service application server may adjust the service requirement of the first service depending on an actual network status.
  • the access network device may delete the radio resource allocated to the first service. In this way, the radio resource allocated to the first service can be released in a timely manner.
  • both the first notification message and the second notification message may carry at least one of the radio channel quality of the first cell, terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, load information of the first cell, a radio access technology (RAT) of the first network, recommended codec information, and bandwidth information of the first service. It may be figured out that the information carried in the first notification message and the second notification message may be used by the service application server to re-determine a service requirement of the first service, to be specific, an updated service requirement of the first service.
  • RAT radio access technology
  • the location information of the UE includes at least one of a cell identity of the UE, a base station identity of the UE, a tracking area identity (TAI) of the UE, a location area identity (LAI) of the UE, and a routing area identity (RAI) of the UE.
  • a cell identity of the UE includes at least one of a cell identity of the UE, a base station identity of the UE, a tracking area identity (TAI) of the UE, a location area identity (LAI) of the UE, and a routing area identity (RAI) of the UE.
  • TAI tracking area identity
  • LAI location area identity
  • RAI routing area identity
  • the service application server may modify the service requirement of the first service to obtain the updated service requirement of the first service, and re-initiate a service setup request to the access network device.
  • the method in this embodiment of this application may further include: receiving, by the access network device, a first service modification request from the first core network device or the first service application server, where the first service modification request carries the updated service requirement of the first service.
  • the access network device may receive the first service modification request that is from the service application server and that is used to request to modify the first service, and the updated service requirement of the first service carried in the first service modification request may be determined by the service application server based on the information carried in the first notification message or in the second notification message.
  • the access network device may determine, in a manner of sending a policy control command to the UE, whether the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service exists.
  • a method for determining, by the access network device, whether the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service exists is described in this embodiment of this application by using a fourth cell to represent the second cell or the third cell.
  • the access network device may determine, by using the following two manners, that “the fourth cell whose radio channel quality satisfies the service requirement of the first service exists”.
  • the access network device delivers a measurement control command to the UE, where the measurement control command is used to indicate the UE to measure the radio channel quality of the fourth cell; the access network device receives a measurement report reported by the UE, where the measurement report carries a measurement result obtained after the UE measures the radio channel quality of the fourth cell; and the access network device determines, based on the measurement result, that the fourth cell whose radio channel quality satisfies the service requirement of the first cell exists.
  • the access network device delivers a measurement control command to the UE, where the measurement control command carries a measurement report condition determined based on the service requirement of the first service, the measurement control command is used to indicate the UE to measure the radio channel quality of the fourth cell, and the measurement report condition is used to indicate the UE to: report a measurement report to the access network device when the UE determines that the radio channel quality of the fourth cell satisfies the measurement report condition; and if the access network device receives the measurement report reported by the UE, the access network device determines that the fourth cell whose radio channel quality satisfies the service requirement of the first service exists.
  • the service requirement of the first service includes at least one of service type indication information of the first service, a radio channel requirement parameter of the first service, codec information of the first service, a codec information list of the UE, and a terminal type of the UE, and the codec information list of the UE includes codec information supported by both the UE and the service application server. It may be figured out that one UE may support at least two types of codec information, and each type of codec information corresponds to one codec type and one codec rating set.
  • the radio channel requirement parameter of the first service includes at least one of a reference signal received power (RSRP) requirement, a reference signal received quality (RSRQ) requirement, and a signal to interference plus noise ratio (SINR) requirement.
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • SINR signal to interference plus noise ratio
  • the codec information of the first service includes codec type information of the first service and codec rating set information of the first service.
  • the radio channel quality includes at least one of RSRP, RSRQ, and an SINR.
  • the terminal type information of the UE includes at least one of an international mobile equipment identity (IMEI) of the UE, a type approval code (TAC) of the IMEI, and an international mobile subscriber identity (IMSI) of the UE.
  • IMEI international mobile equipment identity
  • TAC type approval code
  • IMSI international mobile subscriber identity
  • a specific method for “determining, by the access network device, that radio channel quality of a first cell of a first network in which the UE is located does not satisfy the service requirement of the first service” may be: determining, by the access network device, that the radio channel quality of the first cell satisfies radio channel quality required by at least one type of codec information in the codec information list of the UE but the radio channel quality of the first cell does not satisfy radio channel quality required by the codec information of the first service.
  • the method further includes: determining, by the access network device, the recommended codec information.
  • the first network may be either of a fifth generation mobile communications technology (5G) network and a fourth generation mobile communications technology (4G) network
  • the second network may be any one of a 4G network, a third generation mobile communications technology (3G) network, and a second generation mobile communications technology (2G) network.
  • an embodiment of this application provides a service setup method.
  • the method includes: sending, by a service application server, a first setup request to an access network device, where the first setup request carries a service requirement of a first service, and the service requirement of the first service is used to indicate, to the access network device, a radio channel quality requirement for user equipment UE to execute the first service; receiving, by the service application server, a first setup response from the access network device, where the first setup response is used to notify the service application server that the access network device accepts the first setup request; and receiving, by the service application server, a first notification message from the access network device, where the first notification message is used to notify the service application server that radio channel quality of a first cell of a first network in which the UE is located does not satisfy the service requirement of the first service; or receiving, by the service application server, a second notification message from the access network device, where the second notification message is used to notify the service application server that radio channel quality of a first cell of a first network in which the
  • the access network device may use the received service requirement information as an admission threshold of service setup. In other words, when radio signal quality of the cell in which the UE is located does not satisfy the service requirement, the access network device notifies the service application server, so that the service application server makes a corresponding adjustment; or the access network device may hand over the UE to another cell that can satisfy the service requirement, to complete service setup in the another cell.
  • the access network device may use, as an admission threshold of service setup, a service requirement that is of a to-be-set up service and that is from the service application server, thereby avoiding prior-art problems such as an error and inflexibility caused by determining an admission threshold only based on an empirical value.
  • a network side may adjust the service requirement depending on an actual network status, or hand over the UE to another cell, to ensure that after a service is set up, the service can be normally executed and user experience during the execution of the service is improved.
  • the service application server may determine the service requirement of the first service before sending the first setup request to the access network device. Specifically, the service application server may determine the service requirement of the first service by using the following manners. In a manner 1, the service application server determines the service requirement of the first service based on at least one of a mean opinion score (MOS) requirement of the first service, the radio channel quality of the first cell, terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, codec information of the first service, load information of the first cell, radio access technology RAT information of the first network, and bandwidth information of the first service.
  • MOS mean opinion score
  • the service application server sends a first query request to a third-party network device, where the first query request carries at least one of a MOS requirement of the first service, the radio channel quality of the first cell, terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, codec information of the first service, load information of the first cell, RAT information of the first network, and bandwidth information of the first service; and the service application server receives a first query response from the third-party network device, where the first query response carries the service requirement of the first service.
  • the service application server may first obtain related information used to determine the service requirement of the first service, for example, “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the first service”.
  • related information used to determine the service requirement of the first service for example, “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the first service”.
  • the method in this embodiment of this application may further include: sending, by the service application server, a second query request to the first core network, the UE, or the access network device; and receiving, by the service application server, a second query response from the first core network, the UE, or the access network device, where the second query response carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the first service.
  • the service application server may further obtain, by using the following manner, the related information used to determine the service requirement of the first service.
  • the method in this embodiment of this application may further include: receiving, by the service application server, a first message from the UE, where the first message carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the first service.
  • the service requirement of the first service includes first indication information, second indication information, or third indication information.
  • the service application server may determine an updated service requirement of the first service based on the MOS requirement of the first service or “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the first service” that are carried in the first notification message or the second notification message.
  • the service application server may send a third query request to the third-party network device, where the third query request carries at least one of the MOS requirement of the first service, and the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, the bandwidth information of the first service, and recommended codec information that are carried in the first notification message or the second notification message; and the service application server receives a third query response from the third-party network device, where the first query response carries an updated service requirement of the first service.
  • the method in this embodiment of this application may further include: sending, by the service application server, a first service modification request to the access network device, where the first service modification request carries the updated service requirement of the first service.
  • the method further includes: determining, by the service application server based on at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, the bandwidth information of the first service, and the recommended codec information that are carried in the first notification message or the second notification message, to terminate the first service; and sending, by the service application server, a first service deletion message to the access network device or the UE, where the first service deletion message is used to indicate the access network device or the UE to terminate the first service.
  • the service application server may send the first setup request to the access network device by using the following manners.
  • the service application server delivers the first setup request to the access network device by using the core network device.
  • the service application server delivers the first setup request to the access network device by using an interface between the service application server and the access network device.
  • updated codec information of the first service included in the updated service requirement of the first service is second codec information.
  • the method in this embodiment of this application further includes: determining, by the service application server, the codec information of the first service as first codec information; determining the updated codec information of the first service as the second codec information; and changing the codec information of the first service from the first codec information to the second codec information.
  • the service application server sends a second message to the UE.
  • the second message is used to indicate that the codec information of the first service is changed from the first codec information to the second codec information.
  • the service application server may further change the codec information of the first service from the first codec information to the second codec information when determining that a radio channel requirement corresponding to the first codec information is higher than a radio channel requirement corresponding to the second codec information.
  • an access network device includes a receiving module, a sending module, a determining module, and a handover module.
  • the receiving module is configured to receive a first setup request from a first core network device or a first service application server, where the first setup request carries a service requirement of a first service, and the service requirement of the first service is used to indicate, to the access network device, a radio channel quality requirement for UE to execute the first service.
  • the sending module is configured to send a first setup response to the first core network device or the first service application server, where the first setup response is used to notify the first core network device or the first service application server that the access network device accepts the first setup request.
  • the determining module is configured to determine whether radio channel quality of a first cell of a first network in which the UE is located satisfies the service requirement of the first service.
  • the sending module is configured to: if the determining module determines that the radio channel quality of the first cell does not satisfy the service requirement of the first service, send a first notification message to the first core network device or the first service application server, where the first notification message is used to notify the first core network device or the first service application server that the radio channel quality of the first cell does not satisfy the service requirement of the first service; or the handover module is configured to: if the determining module determines that the radio channel quality of the first cell does not satisfy the service requirement of the first service, hand over the UE to a second cell of the first network, or hand over the UE to a third cell of a second network.
  • the determining module is further configured to: before the sending module sends the first setup response to the first core network device or the first service application server, determine that the radio channel quality of the first cell satisfies the service requirement of the first service.
  • the sending module is specifically configured to: if the determining module determines that the radio channel quality of the first cell satisfies the service requirement of the first service, send the first setup response to the first core network device or the first service application server.
  • the access network device may further include an allocation module.
  • the allocation module is configured to: before the sending module sends the first setup response to the first core network device or the first service application server, allocate a radio resource to the first service.
  • the determining module is further configured to determine whether the service requirement of the first service includes first indication information.
  • the sending module is specifically configured to: if the determining module determines that the service requirement of the first service includes the first indication information, send the first notification message to the first core network device or the first service application server.
  • the first indication information is used to indicate the access network device to: send the first notification message to the first core network device or the first service application server when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the determining module is further configured to: determine whether the service requirement of the first service includes second indication information; and determine whether the second cell whose radio channel quality satisfies the service requirement of the first service exists.
  • the handover module is specifically configured to: if the determining module determines that the service requirement of the first service includes the second indication information and the second cell whose radio channel quality satisfies the service requirement of the first service exists, hand over the UE to the second cell.
  • the second indication information is used to indicate the access network device to: hand over the UE to the second cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the determining module is further configured to: determine whether the service requirement of the first service includes third indication information; and determine whether the third cell whose radio channel quality satisfies the service requirement of the first service exists.
  • the handover module is specifically configured to: if the determining module determines that the service requirement of the first service includes the third indication information and the third cell whose radio channel quality satisfies the service requirement of the first service exists, hand over the UE to the third cell.
  • the third indication information is used to indicate the access network device to: hand over the UE to the third cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the sending module is further configured to: after sending the first setup response to the first core network device or the first service application server, deliver a first measurement control command to the UE.
  • the first measurement control command is used to indicate the UE to measure the radio channel quality of the first cell, and send a first measurement report to the access network device when the radio channel quality of the first cell does not satisfy the service requirement of the first service, and the first measurement report is used to indicate, to the access network device, that the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the receiving module is further configured to: after the sending module sends the first setup response to the first core network device or the first service application server, receive a second setup request from a second core network device or a second service application server, where the second setup request carries a service requirement of a second service, and the service requirement of the second service is used to indicate, to the access network device, a radio channel quality requirement for the UE to execute the second service.
  • the determining module is further configured to determine that the service requirement of the second service is higher than the service requirement of the first service.
  • the sending module is further configured to deliver a second measurement control command to the UE.
  • the second measurement control command is used to indicate the UE to measure the radio channel quality of the first cell, and send a second measurement report to the access network device when the radio channel quality of the first cell does not satisfy the service requirement of the second service, and the second measurement report is used to indicate, to the access network device, that the radio channel quality of the first cell does not satisfy the service requirement of the second service.
  • the sending module is further configured to: if the determining module determines that the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist, send a second notification message to the first core network device or the first service application server.
  • the second notification message is used to notify the first core network device or the first service application server that the radio channel quality of the first cell does not satisfy the service requirement of the first service and the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist.
  • the access network device may further include a deletion module.
  • the deletion module is configured to: if the determining module determines that the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist, delete the radio resource allocated to the first service.
  • the receiving module is further configured to: after the sending module sends the first notification message or the second notification message to the first core network device or the first service application server, receive a first service modification request from the first core network device or the first service application server, where the first service modification request carries an updated service requirement of the first service.
  • a fourth cell is the second cell or the third cell.
  • the determining module is specifically configured to: deliver a third measurement control command to the UE, where the third measurement control command is used to indicate the UE to measure radio channel quality of the fourth cell, receive a third measurement report reported by the UE, where the third measurement report carries a measurement result obtained after the UE measures the radio channel quality of the fourth cell, and determine, based on the measurement result, that the fourth cell whose radio channel quality satisfies the service requirement of the first service exists; or deliver a third measurement control command to the UE, where the third measurement control command carries a measurement report condition determined based on the service requirement of the first service, the third measurement control command is used to indicate the UE to measure radio channel quality of the fourth cell, and the measurement report condition is used to indicate the UE to: report a third measurement report to the access network device when the UE determines that the radio channel quality of the fourth cell satisfies the measurement report condition, and if the third measurement report reported by the
  • the determining module is specifically configured to: if the radio channel quality of the first cell satisfies radio channel quality required by at least one type of codec information in a codec information list of the UE but the radio channel quality of the first cell does not satisfy radio channel quality required by codec information of the first service, determine that the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the determining module is further configured to: after determining that the radio channel quality of the first cell satisfies the radio channel quality required by at least one type of codec information in the codec information list of the UE, determine recommended codec information.
  • the first network is either of a 5G network and a 4G network.
  • the second network is any one of a 4G network, a 3G network, and a 2G network.
  • an access network device includes one or more processors, a memory, a bus system, a transmitter, a receiver, and one or more application programs.
  • the one or more processors, the memory, the transmitter, and the receiver are connected by using the bus system.
  • the one or more application programs are stored in the memory, the one or more application programs include an instruction, and when the processor of the access network device executes the instruction, the access network device performs the service setup method in the first aspect and the possible implementations of the first aspect.
  • a computer readable storage medium stores one or more programs, the one or more programs include an instruction, and when a processor of an access network device executes the instruction, the access network device performs the service setup method in the first aspect and the possible implementations of the first aspect.
  • function modules of the access network device in the third aspect, the fourth aspect, and the possible implementations of the third aspect and the fourth aspect are obtained by performing function division on the access network device to implement the service setup method in the first aspect and the possible implementations of the first aspect.
  • function modules of the access network device in the third aspect, the fourth aspect, and the possible implementations of the third aspect and the fourth aspect are obtained by performing function division on the access network device to implement the service setup method in the first aspect and the possible implementations of the first aspect.
  • a service application server includes a sending module and a receiving module.
  • the sending module is configured to send a first setup request to an access network device, where the first setup request carries a service requirement of a first service, and the service requirement of the first service is used to indicate, to the access network device, a radio channel quality requirement for UE to execute the first service.
  • the receiving module is configured to receive a first setup response from the access network device, where the first setup response is used to notify the service application server that the access network device accepts the first setup request.
  • the receiving module is further configured to receive a first notification message from the access network device, where the first notification message is used to notify the service application server that radio channel quality of a first cell of a first network in which the UE is located does not satisfy the service requirement of the first service.
  • the receiving module is further configured to receive a second notification message from the access network device, where the second notification message is used to notify the service application server that radio channel quality of a first cell of a first network in which the UE is located does not satisfy the service requirement of the first service, the second notification message is used to notify a first core network device or a first service application server that the radio channel quality of the first cell does not satisfy the service requirement of the first service and a second cell or a third cell whose radio channel quality satisfies the service requirement of the first service does not exist, the second cell is located in the first network, and the third cell is located in a second network.
  • the determining module is further configured to: before the sending module sends the first setup request to the access network device, determine the service requirement of the first service based on at least one of a MOS requirement of the first service, the radio channel quality of the first cell, terminal type information of the UE, information about a radio frequency accessed by the UE, location information of the UE, codec information of the first service, load information of the first cell, radio access technology RAT information of the first network, and bandwidth information of the first service.
  • the determining module is further configured to: before the sending module sends the first setup request to the access network device, send a first query request to a third-party network device, where the first query request carries at least one of a MOS requirement of the first service, the radio channel quality of the first cell, terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, codec information of the first service, load information of the first cell, RAT information of the first network, and bandwidth information of the first service; and receive a first query response from the third-party network device, where the first query response carries the service requirement of the first service.
  • the sending module is further configured to: before the determining module determines the service requirement of the first service, send a second query request to the first core network, the UE, or the access network device.
  • the receiving module is further configured to receive a second query response from the first core network, the UE, or the access network device, where the second query response carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the first service.
  • the receiving module is further configured to: before the determining module determines the service requirement of the first service, receive a first message from the UE, where the first message carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the first service.
  • the determining module is further configured to: after the receiving module receives the first notification message or the second notification message from the access network device, determine an updated service requirement of the first service based on at least one of the MOS requirement of the first service, and the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, the bandwidth information of the first service, and recommended codec information that are carried in the first notification message or the second notification message.
  • the determining module is further configured to: after the receiving module receives the first notification message or the second notification message from the access network device, send a third query request to the third-party network device, where the third query request carries at least one of the MOS requirement of the first service, and the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, the bandwidth information of the first service, and recommended codec information that are carried in the first notification message or the second notification message; and receive a third query response from the third-party network device, where the first query response carries an updated service requirement of the first service.
  • the sending module is further configured to: after the determining module determines the updated service requirement of the first service, send a first service modification request to the access network device, where the first service modification request carries the updated service requirement of the first service.
  • the service application server may further include a termination module.
  • the termination module is configured to: after the receiving module receives the first notification message or the second notification message from the access network device, determine, based on at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the first service, the load information of the first cell, the RAT information of the first network, the bandwidth information of the first service, and the recommended codec information that are carried in the first notification message or the second notification message, to terminate the first service.
  • the sending module is further configured to send a first service deletion message to the access network device or the UE, where the first service deletion message is used to indicate the access network device or the UE to terminate the first service.
  • the sending module is specifically configured to: deliver a first setup request to the access network device by using the core network device; or deliver a first setup request to the access network device by using an interface between the service application server and the access network device.
  • the sending module is further configured to send a second message to the UE.
  • the second message is used to indicate that the codec information of the first service is changed from first codec information to second codec information.
  • the determining module is further configured to determine that a radio channel requirement corresponding to the first codec information is higher than a radio channel requirement corresponding to the second codec information.
  • a service application server includes one or more processors, a memory, a bus system, a transmitter, a receiver, and one or more application programs.
  • the one or more processors, the memory, the transmitter, and the receiver are connected by using the bus system.
  • the one or more application programs are stored in the memory, the one or more application programs include an instruction, and when the processor of the service application server executes the instruction, the service application server performs the service setup method in the second aspect and the possible implementations of the second aspect.
  • a computer readable storage medium stores one or more programs, the one or more programs include an instruction, and when a processor of the service application server executes the instruction, the service application server performs the service setup method in the second aspect and the possible implementations of the second aspect.
  • function modules of the service application server in the sixth aspect, the seventh aspect, and the possible implementations of the sixth aspect and the seventh aspect are obtained by performing function division on the service application server to implement the service setup method in the second aspect and the possible implementations of the second aspect.
  • function modules of the service application server in the sixth aspect, the seventh aspect, and the possible implementations of the sixth aspect and the seventh aspect are obtained by performing function division on the service application server to implement the service setup method in the second aspect and the possible implementations of the second aspect.
  • FIG. 1 is a schematic diagram of a network architecture of a communications network according to an embodiment of this application;
  • FIG. 2 is a schematic diagram of a network architecture of another communications network according to an embodiment of this application.
  • FIG. 3 is a flowchart of a service setup method according to an embodiment of this application.
  • FIG. 4 is a flowchart of another service setup method according to an embodiment of this application.
  • FIG. 5 is a flowchart of another service setup method according to an embodiment of this application.
  • FIG. 6 is a flowchart of another service setup method according to an embodiment of this application.
  • FIG. 7A and FIG. 7B are a flowchart of another service setup method according to an embodiment of this application.
  • FIG. 8 is a flowchart of another service setup method according to an embodiment of this application.
  • FIG. 9 is a flowchart of another service setup method according to an embodiment of this application.
  • FIG. 10 is a flowchart of another service setup method according to an embodiment of this application.
  • FIG. 11A and FIG. 11B are a flowchart of another service setup method according to an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of an access network device according to an embodiment of this application.
  • FIG. 13 is a schematic structural diagram of another access network device according to an embodiment of this application.
  • FIG. 14 is a schematic structural diagram of a service application server according to an embodiment of this application.
  • FIG. 15 is a schematic structural diagram of another service application server according to an embodiment of this application.
  • FIG. 16 is a schematic structural diagram of another service application server according to an embodiment of this application.
  • the technical solutions of this application may be applied to a 2G network, a 3G network, a 4G network, and a 5G network.
  • the technical solutions of this application are not only applicable to a VoLTE service and a video call service, but also applicable to another service having a similar requirement on network signal coverage.
  • This application does not limit a service type of user equipment and a network in which the user equipment is located.
  • FIG. 1 is a schematic diagram of a network architecture of a communications network according to an embodiment of this application.
  • the communications network may include an access network device 11 , a service application server 12 , and at least one user equipment (UE) 13 .
  • the access network device 11 may be connected to the UE 13 by using a wireless communications link.
  • the service application server 12 is responsible for processing a service registration request, subscriber management, session control, service switching, service control, and the like of the UE.
  • There may be another core network device between the access network device 11 and the service application server 12 and the core network device is responsible for connecting a service between the UE 13 and the service application server 12 .
  • FIG. 2 shows an example in which the network architecture of the communications network shown in FIG. 1 is specifically a 4G network.
  • An evolved NodeB (eNB) in FIG. 2 is used as the access network device in FIG. 1 , and the eNB may be in a communication connection to UE (to be specific, the UE 13 in FIG. 1 ) by using a radio link.
  • a core network device in an LTE network of the network architecture shown in FIG. 2 may include a mobility management entity (MME), a serving gateway (SGW), a packet data network gateway (PGW), a policy and charging rules function (PCRF) entity, or the like.
  • MME mobility management entity
  • SGW serving gateway
  • PGW packet data network gateway
  • PCRF policy and charging rules function
  • the core network device may be responsible for connecting a VoLTE service and the like of the UE to an Internet Protocol Multimedia Subsystem (IMS) network, and be responsible for transmitting signaling related to a VoLTE call and the like between the UE and the IMS network.
  • QCI quality of service class identifier
  • An IMS network device shown in FIG. 2 for example, a proxy call session control function (P-CSCF) entity, an interrogating/serving call session control function (S-CSCF) entity, or a service centralization and continuity application server (SCC AS), may be used as any service application server in the embodiments of this application.
  • P-CSCF proxy call session control function
  • S-CSCF interrogating/serving call session control function
  • SCC AS service centralization and continuity application server
  • the P-CSCF entity (which may be classified into a calling P-CSCF entity and a called P-CSCF entity) is a first contact point when the UE accesses the IMS network in a process of a VoLTE service or the like, and may be responsible for acting as a proxy of processing signaling related to the VoLTE service and the like, and implementing route control.
  • the S-CSCF entity (which may be classified into a calling S-CSCF entity and a called S-CSCF entity) is a service switching center of the IMS network.
  • the S-CSCF entity may be mainly responsible for receiving and processing the service registration request, subscriber management, session control, service switching, service control, Session Initiation Protocol (SIP) message processing and charging, and the like of the UE.
  • the SCC AS (which may be classified into a calling SCC AS and a called SCC AS) is configured to play a role of keeping service continuity when the UE moves between the LTE network and another network.
  • the UE in this embodiment of this application may be a wireless terminal or a wired terminal.
  • the UE may be a mobile phone, a computer, a tablet computer, a personal digital assistant (PDA), a mobile Internet device (MID), a wearable device, or an e-book reader.
  • PDA personal digital assistant
  • MID mobile Internet device
  • wearable device or an e-book reader.
  • Some technical solutions of the embodiments of this application may be specifically implemented based on the communications network architecture shown in FIG. 1 or a variant architecture of the communications network architecture.
  • An embodiment of this application provides a service setup method. As shown in FIG. 3 , the service setup method includes the following steps.
  • a service application server sends a first setup request to an access network device or a core network device, where the first setup request carries a service requirement of a to-be-set up service.
  • the service requirement of the to-be-set up service is used to indicate, to the access network device or the core network device, a radio channel quality requirement required for UE to execute the to-be-set up service.
  • the service application server in this embodiment of this application is a service application server in an IMS network, for example, any one of or an integration of at least two of P-CSCF, ATCF, S-CSCF, and an SCC AS.
  • the first setup request may be delivered by the service application server to the access network device after the service application server receives a request message of setting up the to-be-set up service for the UE.
  • the to-be-set up service may be a VoLTE service, a video service, or a service of another service type.
  • the to-be-set up service is a VoLTE service
  • the service application server (for example, the P-CSCF, the ATCF, the S-CSCF, or the SCC AS) may send a service setup request message (to be specific, the first setup request) to the access network device (for example, an eNB) after receiving an invite message of setting up the VoLTE service for the UE.
  • the first setup request is used to request the access network device (for example, the eNB) to allocate a radio network resource to the VoLTE service.
  • the UE may be calling UE, and correspondingly, the service application server is a calling service application server.
  • the UE may be called UE, and correspondingly, the service application server is a called service application server.
  • the service application server may send the first setup request to the access network device by using either of the following two implementations.
  • Manner 1 The service application server delivers the first setup request to the access network device by using the core network device.
  • the service application server may send an authentication authorization request to the PCRF, to trigger an evolved packet system (EPS) core network device to initiate a process of creating a voice dedicated bearer.
  • the authentication authorization request includes service requirement information of the VoLTE service.
  • the EPS core network device may send a request message of creating the voice dedicated bearer to the access network device.
  • the request message of creating the voice dedicated bearer includes the service requirement information of the VoLTE service.
  • the service application server delivers the first setup request to the access network device by using an interface between the service application server and the access network device.
  • the interface between the service application server and the access network device may be a private interface disposed by a device manufacturer between the service application server and the access network device.
  • the service application server may directly deliver the first setup request (for example, the setup request of the VoLTE service) to the access network device by using the private interface.
  • the first setup request carries the service requirement of the to-be-set up service.
  • a related request message (for example, the first setup request) from using the private interface may be carried in an extension field of the header of a Real-Time Transport Protocol (RTP) flow data packet.
  • RTP Real-Time Transport Protocol
  • the service requirement of the to-be-set up service may include at least one of service type indication information of the to-be-set up service, a radio channel requirement of the to-be-set up service, codec information of the to-be-set up service, a codec information list of the UE, and terminal type information of the UE, and the codec information list of the UE includes codec information supported by both the UE and the service application server.
  • the radio channel requirement of the to-be-set up service may include at least one of a reference signal received power (RSRP) requirement, a reference signal received quality (RSRQ) requirement, and a signal to interference plus noise ratio (SINR) requirement.
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • SINR signal to interference plus noise ratio
  • the codec information of the to-be-set up service includes codec type information of the to-be-set up service and codec rating set information of the to-be-set up service.
  • the terminal type information of the UE includes at least one of an international mobile equipment identity (IMEI) of the UE, a type approval code (TAC) of the IMEI, and an international mobile subscriber identity (IMSI) of the UE.
  • IMEI international mobile equipment identity
  • TAC type approval code
  • IMSI international mobile subscriber identity
  • the access network device receives the first setup request from the core network device or the service application server.
  • the access network device may receive, by using the core network device, the first setup request from the service application server; or if the service application server sends the first setup request to the access network device by using the foregoing manner 2, the access network device may directly receive, by using the private interface between the service application server and the access network device, the first setup request from the service application server.
  • the access network device determines that radio channel quality of a first cell of a first network in which UE is located does not satisfy the service requirement of the to-be-set up service.
  • the first network in this embodiment of this application may be either of a 5G network and a 4G network.
  • the access network device may determine whether the radio channel quality of the first cell satisfies the service requirement of the to-be-set up service. If determining that the radio channel quality of the first cell satisfies the service requirement of the to-be-set up service, the access network device may allocate a radio resource to the to-be-set up service. Alternatively, if determining that the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service, the access network device may continue to perform S 304 and S 305 , or S 306 , or S 307 .
  • the access network device may obtain the radio channel requirement of the to-be-set up service based on the service requirement of the to-be-set up service, and then compare the radio channel quality of the first cell with the service requirement based on the obtained radio channel requirement of the to-be-set up service, to determine whether the radio channel quality of the first cell satisfies the service requirement of the to-be-set up service.
  • the access network device may determine, based on the service type indication information, a specific service type of the to-be-set up service (for example, the to-be-set up service is a VoLTE service, a video service, or a service of another type). Then, the access network device may determine a radio channel requirement (for example, an RSRP requirement, an RSRQ requirement, or an SINR requirement) of the to-be-set up service based on the service type of the to-be-set up service and a preconfigured correspondence between a service type and a radio channel requirement.
  • a radio channel requirement for example, an RSRP requirement, an RSRQ requirement, or an SINR requirement
  • the access network device may determine, based on the codec information of the to-be-set up service, a radio channel requirement corresponding to the codec information of the to-be-set up service.
  • the access network device may determine, based on that an uplink and/or downlink radio channel quality parameter of the first cell in which the UE is located cannot satisfy the radio channel requirement of the to-be-set up service, that the radio channel quality of the first cell of the first network in which the UE is located cannot satisfy the service requirement of the to-be-set up service.
  • the uplink and/or downlink channel quality parameter may include at least one of an uplink and/or downlink RSRP, an uplink and/or downlink SINR, and an uplink and/or downlink RSRQ.
  • the access network device may determine that the radio channel quality of the first cell cannot satisfy the service requirement of the to-be-set up service.
  • the service requirement of the to-be-set up service may include the codec information of the to-be-set up service and the codec information list of the UE.
  • the codec information list of the UE includes the codec information supported by both the UE and the service application server.
  • the “determining, by the access network device, that radio channel quality of a first cell of a first network in which UE is located does not satisfy the service requirement of the to-be-set up service” in S 303 may specifically include: determining, by the access network device, that the radio channel quality of the first cell satisfies radio channel quality required by at least one type of codec information in the codec information list of the UE but the radio channel quality of the first cell does not satisfy radio channel quality required by the codec information of the to-be-set up service.
  • the access network device sends a first setup response to the core network device or the service application server, where the first setup response is used to notify the core network device or the service application server that the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service.
  • the first setup response carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, load information of the first cell, RAT information of the first network, recommended codec information, and bandwidth information of the to-be-set up service. It may be figured out that after determining that the radio channel quality of the first cell satisfies the radio channel quality required by at least one type of codec information in the codec information list of the UE, the access network device may determine the recommended codec information.
  • the recommended codec information may be codec information that is selected by the access network device from the codec information list of the UE and that is supported by both the UE and the service application server, and the recommended codec information is one piece of codec information in codec information supported by the first cell.
  • the location information of the UE includes at least one of a cell identity of the UE, a base station identity of the UE, a TAI of the UE, an LAI of the UE, and an RAI of the UE.
  • the service application server receives the first setup response from the access network device or the core network device.
  • the access network device hands over the UE to a second cell of the first network.
  • the access network device hands over the UE to a third cell of a second network.
  • the access network device may attempt to hand over the UE to the second cell of the first network or the third cell of the second network when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service.
  • the second network is any one of a 4G network, a 3G network, and a 2G network.
  • the second network may be any one of a 4G network, a 3G network, and a 2G network.
  • the first network is a 4G network
  • the second network may be a 3G network or a 2G network.
  • the first cell and the second cell in this embodiment of this application are different cells of the first network.
  • the service application server may deliver corresponding service requirement information to the access network device depending on a service demand and a real-time status.
  • the access network device may use the received service requirement information as an admission threshold of service setup.
  • the access network device notifies the service application server, so that the service application server makes a corresponding adjustment.
  • the access network device may hand over the UE to another cell that can satisfy the service requirement, to complete service setup in the another cell.
  • the access network device may use, as an admission threshold of service setup, the service requirement that is of the to-be-set up service and that is from the service application server, thereby avoiding problems such as an error and inflexibility caused by determining an admission threshold only based on an empirical value.
  • a network side may adjust the service requirement depending on an actual network status, or hand over the UE to another cell, to ensure that after a service is set up, the service can be normally executed and user experience during the execution of the service is improved.
  • the service application server may indicate, by using indication information (for example, first indication information, second indication information, or third indication information) included in the service requirement of the to-be-set up service, the access network device to: directly reply to the service application server with the first setup response or hand over the UE to another cell when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service, to be specific, indicate the access network device to: determine to perform one of S 304 , S 306 , or S 307 when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service.
  • indication information for example, first indication information, second indication information, or third indication information
  • the access network device may directly send the first setup response to the core network device or the service application server when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service.
  • S 304 in FIG. 3 may be replaced with S 304 ′.
  • the access network device If determining that the service requirement of the to-be-set up service includes first indication information, the access network device sends a first setup response to the core network device or the service application server.
  • the second indication information is used to indicate the access network device to: hand over the UE to the second cell when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service
  • the access network device may hand over the UE to the second cell of the first network when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service.
  • S 306 in FIG. 3 may be replaced with S 306 ′.
  • the access network device determines that the service requirement of the to-be-set up service includes second indication information and the access network device determines that a second cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists, the access network device hands over the UE to the second cell.
  • the third indication information is used to indicate the access network device to: hand over the UE to the third cell when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service
  • the access network device may hand over the UE to the third cell when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service.
  • S 307 in FIG. 3 may be replaced with S 307 ′.
  • the access network device determines that the service requirement of the to-be-set up service includes third indication information and the access network device determines that a third cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists, the access network device hands over the UE to the third cell.
  • the access network device may determine that the second cell or the third cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists.
  • the determining that the second cell or the third cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists is described by using an example in which the access network device determines that the second cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists.
  • the access network device may deliver a measurement control command to the UE.
  • the measurement control command is used to indicate the UE to measure the radio channel quality of the second cell.
  • the access network device receives a measurement report reported by the UE.
  • the measurement report carries a measurement result obtained after the UE measures the radio channel quality of the second cell.
  • the measurement result may include a radio channel quality parameter of the second cell, and the access network device may determine, based on the measurement result, that the second cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists.
  • the measurement result may be indication information indicating that the second cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists
  • the access network device may directly determine, based on an indication of the measurement result, that the second cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists.
  • the access network device delivers a measurement control command to the UE.
  • the measurement control command carries a measurement report condition determined based on the service requirement of the to-be-set up service.
  • the measurement control command is used to indicate the UE to measure the radio channel quality of the second cell
  • the measurement report condition is used to indicate the UE to: report a measurement report to the access network device when the UE determines that the radio channel quality of the second cell satisfies the measurement report condition. If the access network device receives the measurement report reported by the UE, the access network device determines that the second cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists.
  • a method for determining, by the access network device, that the third cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists is similar to a method for determining, by the access network device, that the second cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists, and details are not described in this embodiment of this application again.
  • the method in this embodiment of this application may further include S 308 and S 309 .
  • the access network device determines that the second cell or the third cell whose radio channel quality satisfies the service requirement of the to-be-set up service does not exist, the access network device sends a second setup response to the core network device or the service application server.
  • the second setup response is used to notify the core network device or the service application server that the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service and the second cell or the third cell whose radio channel quality satisfies the service requirement of the to-be-set up service does not exist.
  • a method for sending, by the access network device, the second setup response to the core network device or the service application server is similar to a method for sending, by the access network device, the first setup response to the core network device or the service application server, and details are not described in this embodiment of this application again.
  • the service application server receives the second setup response from the access network device or the core network device.
  • the second setup response carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the load information of the first cell, the RAT information of the first network, the recommended codec information, and the bandwidth information of the to-be-set up service.
  • At least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the load information of the first cell, the RAT information of the first network, the recommended codec information, and the bandwidth information of the to-be-set up service that are carried in the first setup response or the second setup response may be used by the service application server to update the to-be-set up service.
  • the service application server may determine that the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service, so that a second setup request carrying an updated service requirement of the to-be-set up service may be sent to the access network device.
  • the method in this embodiment of this application may further include S 310 and S 311 .
  • the service application server sends a second setup request to the access network device or the core network device, where the second setup request carries an updated service requirement of the to-be-set up service.
  • a method for sending, by the service application server, the second setup request to the access network device or the core network device is similar to a method for sending, by the service application server, the first setup request to the access network device or the core network device, and details are not described in this embodiment of this application again.
  • the access network device receives the second setup request from the core network device or the service application server.
  • a method for receiving, by the access network device, the second setup request from the core network device or the service application server is similar to a method for receiving, by the access network device, the first setup request from the core network device or the service application server, and details are not described in this embodiment of this application again.
  • the access network device may determine whether the radio channel quality of the first cell satisfies the updated service requirement of the to-be-set up service carried in the second setup request.
  • the access network device may determine whether the radio channel quality of the first cell satisfies the updated service requirement of the to-be-set up service carried in the second setup request.
  • a method for determining, by the access network device, whether the radio channel quality of the first cell satisfies the updated service requirement of the to-be-set up service refer to the method for determining, by the access network device, whether the radio channel quality of the first cell satisfies the service requirement of the to-be-set up service, and details are not described in this embodiment of this application again.
  • the codec information of the to-be-set up service included in the service requirement of the to-be-set up service is first codec information
  • updated codec information of the to-be-set up service included in the updated service requirement of the to-be-set up service is second codec information.
  • the service application server may determine that the codec information of the to-be-set up service is the first codec information and the updated codec information of the to-be-set up service is the second codec information, and change the codec information of the to-be-set up service from the first codec information to the second codec information.
  • the service application server may determine, when sending the second setup request, that the updated codec information of the to-be-set up service is the second codec information.
  • the service application server may further send a second message to the UE, and the second message is used to indicate that the codec information of the to-be-set up service is changed from the first codec information to the second codec information.
  • the service application server may change the codec information of the to-be-set up service from the first codec information to the second codec information when determining that a radio channel requirement corresponding to the first codec information is higher than a radio channel requirement corresponding to the second codec information, and send the second message to the UE.
  • the first codec information and the second codec information may be a same type of codec, but use different codec rating sets.
  • both the first codec information and the second codec information are EVS codec, but a codec rating set of the first codec information is an EVS full rating set, and a codec rating set of the second codec information is an EVS VBR mode.
  • the service application server may determine the service requirement of the to-be-set up service. Specifically, before S 301 shown in any one of FIG. 3 to FIG. 6 , the method in this embodiment of this application may further include S 401 , or S 402 to S 405 .
  • the service application server determines the service requirement of the to-be-set up service based on at least one of a mean opinion score (MOS) of the to-be-set up service, the radio channel quality of the first cell, terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, codec information of the to-be-set up service, load information of the first cell, RAT information of the first network, and bandwidth information of the to-be-set up service.
  • MOS mean opinion score
  • the service application server may store a correspondence between an MOS or “at least one of radio channel quality of a cell in which a terminal is located, terminal type information of the terminal, information about a carrier frequency accessed by the terminal, location information of the UE, codec information of a service, load information of the cell in which the terminal is located, RAT information of a network in which the terminal is located, and bandwidth information of the service” and a service requirement of the service.
  • the correspondence is obtained by the service application server through statistics collection by using big data.
  • the service application server may query the correspondence based on the MOS requirement of the to-be-set up service, or “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service”, to determine the service requirement of the to-be-set up service.
  • a third-party network device storing the correspondence may determine the service requirement of the to-be-set up service.
  • the method in this embodiment of this application may further include S 402 to S 405 .
  • the service application server sends a first query request to a third-party network device, where the first query request carries at least one of the MOS requirement of the to-be-set up service, the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service.
  • the third-party network device receives the first query request, and determines the service requirement of the to-be-set up service based on at least one of the MOS requirement of the to-be-set up service, the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service that are carried in the first query request.
  • the third-party network device sends a first query response to the service application server, where the first query response carries the service requirement of the to-be-set up service.
  • the service application server receives the first query response from the third-party network device.
  • the service application server may first obtain “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service” used to determine the service requirement of the to-be-set up service.
  • the service application server may obtain “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service” in a process in which the core network device sets up a video session for calling UE and called UE.
  • the method in this embodiment of this application may further include S 501 to S 504 .
  • the service application server sends a second query request to the core network device, the UE, or the access network device, where the second query request is used to indicate the core network device, the UE, or the access network device to query “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service”.
  • the core network device, the UE, or the access network device receives the second query request from the service application server.
  • the core network device, the UE, or the access network device queries “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service”.
  • the service application server receives a second query response from the core network device, the UE, or the access network device, where the second query response carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service.
  • the service application server may obtain “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service” by receiving a session message from the UE.
  • the method in this embodiment of this application may further include S 505 .
  • the service application server receives a first message from the UE, where the first message carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service.
  • the first message may be related Session Initiation Protocol (SIP) signaling of the to-be-set up service.
  • SIP Session Initiation Protocol
  • the service application server may receive and parse the SIP signaling, to obtain “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service”.
  • the service application server may determine the updated service requirement of the to-be-set up service.
  • the method in this embodiment of this application may further include S 601 , or S 602 to S 605 .
  • the service application server determines the updated service requirement of the to-be-set up service based on at least one of the MOS requirement of the to-be-set up service, and the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service that are carried in the first setup response or the second setup response.
  • the service application server sends a third query request to a third-party network device, where the third query request carries at least one of the MOS requirement of the to-be-set up service, and the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service that are carried in the first setup response.
  • the third-party network device receives the third query request, and determines the updated service requirement of the to-be-set up service based on at least one of the MOS requirement of the to-be-set up service, and the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service that are carried in the first setup response, where the foregoing information is carried in the third query request.
  • the third-party network device sends a third query response to the service application server, where the first query response carries the updated service requirement of the to-be-set up service.
  • the service application server receives the third query response from the third-party network device.
  • the service application server may further terminate the to-be-set up service after receiving the first setup response or the second setup response.
  • the method in this embodiment of this application may further include: determining, by the service application server based on at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service that are carried in the first setup response or the second setup response, to terminate the to-be-set up service; sending, by the service application server, a to-be-set up service deletion message to the UE, where the to-be-set up service deletion message is used to indicate the UE to terminate the to-be-set up service; and receiving, by the UE, the to-be-set up service deletion message from the service application server,
  • the service application server may deliver corresponding service requirement information to the access network device depending on a service demand and a real-time status.
  • the access network device may use the received service requirement information as an admission threshold of service setup.
  • the access network device may refuse to allocate a radio resource to the service, and at the same time, notify the service application server, so that the service application server makes a corresponding adjustment.
  • the access network device may hand over the UE to another cell that can satisfy the service requirement, to complete service setup in the another cell.
  • the access network device may use, as an admission threshold of service setup, the service requirement that is of the to-be-set up service and that is from the service application server, thereby avoiding the problems such as an error and inflexibility caused by determining an admission threshold only based on an empirical value.
  • a network side may adjust the service requirement depending on an actual network status, or hand over the UE to another cell, to ensure that after a service is set up, the service can be normally executed and user experience during the execution of the service is improved.
  • the UE may be calling UE or called UE of a video call service
  • the access network device may be an eNB corresponding to the calling UE or an eNB corresponding to the called UE
  • the service application server may be an IMS core network device (for example, P-CSCF ⁇ S-CSCF ⁇ an SCC AS ⁇ ATCF) corresponding to the calling UE or an IMS core network device corresponding to the called UE.
  • a service setup method provided in an embodiment of this application may include the following steps.
  • An IMS core network device receives a video call service request message from calling UE, sets up a video session for the calling UE and called UE, and performs service requirement (for example, codec information) negotiation.
  • service requirement for example, codec information
  • the IMS core network device may negotiate with the calling UE and the called UE about codec information of the video call service.
  • the codec information of the video call service may include a codec type and codec rating set information of the video call.
  • the codec type of the video call may be a codec scheme such as enhanced voice service (EVS) codec, adaptive multi-rate wideband speech codec (AMR WB), adaptive multi rate-narrow band speech codec (AMR NB), and Moving Picture Experts Group (MPEG) codec.
  • EVS enhanced voice service
  • AMR WB adaptive multi-rate wideband speech codec
  • AMR NB adaptive multi rate-narrow band speech codec
  • MPEG Moving Picture Experts Group
  • the codec rating set information (codec rating set) of the video call may indicate that a codec rating of the video call is 6.60 to 23.85 kbps.
  • the IMS core network device may further obtain other initial parameters of the video call service from UE, an eNB, or an evolved packet core (EPC) device.
  • the other initial parameters may include a terminal type of the UE, radio channel quality of a 4G cell in which the UE is located, carrier frequency information of the 4G cell in which the UE is located, current location information of the UE, load information (for example, whether the cell is overloaded) of the 4G cell in which the UE is located, and information about a bandwidth required by the video call service.
  • the terminal type of the UE may be at least one of an IMEI, an IMSI, and an IMEI of the UE.
  • the IMEI included in the other initial parameters may be specifically a TAC in the first eight bits of the IMEI, and the TAC is usually used to represent a model of the UE.
  • the radio channel quality of the 4G cell in which the UE is located may be at least one of RSRP, RSRQ, and an SINR.
  • the carrier frequency information of the 4G cell in which the UE is located may indicate that a carrier frequency of the 4G cell in which the UE is located is 1800 MHz, 900 MHz, or the like.
  • the current location information of the UE is used to indicate that the UE is located in a 4G cell of a common macro network, a 4G cell of a high-speed railway dedicated network, or the like.
  • the load information of the 4G cell in which the UE is located is used to indicate whether the 4G cell in which the UE is located is overloaded.
  • the terminal type information of the UE may be included in related session signaling generated when the UE initiates the video call service.
  • Session Initiation Protocol (SIP) signaling may carry the terminal type information of the UE.
  • the IMS core network device may receive and parse the SIP signaling, to obtain the terminal type information of the UE.
  • the IMS core network device may alternatively obtain the terminal type information of the UE from the UE or the EPC device (for example, an MME) by sending a query request.
  • the SIP signaling may further carry information such as the radio channel quality of the 4G cell in which the UE is located.
  • the IMS core network device determines a service requirement of a video call service based on at least one of a MOS requirement of the video call service, radio channel quality of a cell in which UE is located, terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, codec information of the video call service, load information of the cell in which the UE is located, RAT information of the cell in which the UE is located, and bandwidth information of the video call service.
  • the service requirement of the video call service is a requirement imposed by the video call service on a radio channel of the eNB.
  • the service requirement of the video call service may include at least one of service type indication information of the video call service, a radio channel requirement of the video call service, the codec information of the video call service, and the terminal type of the UE.
  • the radio channel requirement of the video call service may include at least one of an RSRP requirement, an RSRQ requirement, and an SINR requirement.
  • the radio channel requirement of the video call service is used to indicate that the video call service requires that a minimum standard of RSRP of a first cell in which the UE is located is the RSRP requirement, a minimum standard of RSRQ of the first cell in which the UE is located is the RSRQ requirement, and a minimum standard of an SINR of the first cell in which the UE is located is the SINR requirement.
  • the codec information of the video call service includes the codec type information of the video call service and the codec rating set information of the video call service.
  • the codec information of the video call service is used to indicate a codec type and a codec rating that the video call service is allowed to use.
  • the terminal type information of the UE includes at least one of the IMEI of the UE, the TAC of the IMEI, and the IMSI of the UE.
  • an internal database of the IMS core network device stores a correspondence between the MOS of the video call service or “at least one of the radio channel quality of the cell in which the terminal is located, the terminal type information of the terminal, the information about the carrier frequency accessed by the terminal, the location information of the UE, the codec information of the service, the load information of the cell in which the terminal is located, RAT information of a network in which the terminal is located, and the bandwidth information of the service” and the service requirement of the video call service, the IMS core network device may query the correspondence to determine the service requirement of the video call service.
  • a method for obtaining, by the IMS core network device, the service requirement based on another parameter is similar to the foregoing descriptions of examples, and details are not described herein again.
  • a third-party network device storing the correspondence may determine the service requirement of the video call service, and send the determined service requirement of the video call service to the IMS core network device.
  • a method for determining, by the third-party network device, the service requirement of the video call service is similar to the method for determining, by the IMS core network device, the service requirement of the video call service, and details are not described in this embodiment of this application again.
  • the IMS core network device sends a first setup request of the video call service to an eNB, to trigger the eNB to allocate a radio resource to the video call service, where the setup request of the video call service carries the service requirement of the video call service.
  • S 703 may include:
  • the IMS core network device initiating, by the IMS core network device, an authentication authorization request (AAR) message to a PCRF, to trigger creation of a dedicated bearer of the video call service.
  • AAR authentication authorization request
  • the AAR message may further carry service requirement information (as shown in FIG. 7A and FIG. 7B , a description is provided by using an example in which the service requirement information of the video call service includes the RSRP requirement) of the video call service.
  • the PCRF may send a re-authentication request (RAR) message carrying a quality of service (QoS) rule to a PGW of EPC based on the media description information carried in the AAR, to trigger the PGW to create a user plane data dedicated bearer of the video call service.
  • RAR re-authentication request
  • QoS quality of service
  • the RAR message carries the service requirement information (as shown in FIG. 1 , a description is provided by using an example in which the service requirement information of the video call service includes the RSRP requirement) of the video call service.
  • the PGW may trigger a process of creating the dedicated bearer of the video call service, and send a create bearer request message to an eNB of an access network by using an SGW of the EPC and the MME (namely, the EPC device).
  • the create bearer request message carries the service requirement information of the video call service (as shown in FIG. 1 , a description is provided by using an example in which the service requirement information of the video call service includes the RSRP requirement).
  • the IMS core network device may alternatively directly send the setup request of the video call service to the eNB.
  • the setup request of the video call service carries the service requirement information of the video call service.
  • the IMS core network device may send the setup request of the video call service to the eNB by using the interface.
  • the interface between the IMS core network device and the eNB is the interface between the service application server and the access network device in the foregoing embodiment.
  • the IMS core network device may alternatively generate a user plane data packet (for example, an RTP data packet), and add the service requirement information of the video call service (for example, the RSRP requirement) to the user plane data packet, so that the eNB can parse out the RSRP requirement after receiving the user plane data packet.
  • a user plane data packet for example, an RTP data packet
  • the service requirement information of the video call service for example, the RSRP requirement
  • the eNB receives the first setup request of the video call service.
  • the eNB determines that radio channel quality of a 4G network cell in which the UE is located does not satisfy the service requirement of the video call service.
  • the RSRP requirement is used as the service requirement
  • S 705 is specifically: determining, by the eNB, that RSRP of the 4G network cell in which the UE is located does not satisfy the RSRP requirement of the video call service.
  • the method in this embodiment of this application may further include S 706 , S 707 , or S 708 .
  • the eNB may determine to perform one of S 706 , S 707 , or S 708 based on indication information included in the service requirement of the video call service.
  • the eNB If determining that the service requirement of the video call service includes first indication information, the eNB sends a first setup response to the IMS core network device.
  • the eNB may send the first setup response to the IMS core network device by using the following manner.
  • the eNB may send a create bearer response message to the EPC device (for example, the MME).
  • the create bearer response message carries indication information used to indicate that the eNB cannot provide the radio channel quality indicated by the service requirement of the video call service.
  • the EPC device may send a credit control request (CCR) message to the PCRF after receiving the create bearer response.
  • CCR credit control request
  • the CCR message carries indication information used to indicate that creation of the dedicated bearer of the video call service fails, and carries the indication information used to indicate that the eNB cannot provide the radio channel quality indicated by the service requirement of the video call service.
  • the PCRF may send an RAR message or an abort-session-request (ASR) message to the IMS core network device.
  • the RAR message or the ASR message carries the indication information indicating that the eNB cannot provide the radio channel quality indicated by the service requirement of the video call service.
  • the eNB may further send the first setup response to the IMS core network device by using the interface between the eNB and the IMS core network device.
  • the interface between the IMS core network device and the eNB is the interface between the service application server and the access network device in the foregoing embodiment.
  • the eNB may add the first setup response to the user plane data packet, and send the user plane data packet to the IMS core network device.
  • the eNB may further report “at least one of the radio channel quality of the 4G network cell in which the UE is currently located, the terminal type information of the UE, carrier frequency information of the 4G cell, the location information of the UE, time information, load information of the 4G cell, and the bandwidth information of the video call service” by using the create bearer response message, the CCR message, the RAR message or the ASR message, the interface between the eNB and the IMS core network device, or the user plane data packet. As shown in FIG. 7A and FIG.
  • the first setup response carries “at least one of the radio channel quality of the 4G network cell in which the UE is currently located, the terminal type information of the UE, the carrier frequency information of the 4G cell, the location information of the UE, the time information, the load information of the 4G cell, and the bandwidth information of the video call service” is described by using an example in which the create bearer response, the CCR message, or the RAR message carries the RSRP of the first cell.
  • the method in this embodiment of this application may further include:
  • the eNB determines that the service requirement of the video call service includes second indication information, and the eNB determines that a second cell whose radio channel quality satisfies the service requirement of the video call service exists, handing over, by the eNB, the UE to the second cell; or
  • the eNB determines that the service requirement of the video call service includes third indication information, and the eNB determines that a third cell whose radio channel quality satisfies the service requirement of the video call service exists, handing over, by the eNB, the UE to the third cell.
  • the eNB may perform an internal handover process for the UE in a 4G network, to hand over the UE from the first cell to the second cell in the 4G network, or the eNB may perform an inter-network handover process for the UE from a 4G network to a 3G network or 2G network, to hand over the UE from the first cell of the 4G network to the third cell of the 3G network or 2G network.
  • the video call service may be executed in a packet switched (PS) domain of the 3G network or 2G network.
  • the inter-network handover process belongs to a PS to PS handover process.
  • the video call service may be executed in a circuit switched (CS) domain of the 3G network or 2G network.
  • the inter-network handover process belongs to a PS to CS handover process.
  • the IMS core network device may add the indication information (the first indication information, the second indication information, or the third indication information) to the service requirement of the video call service when the UE satisfies the following conditions.
  • Condition 1 The UE supports speech codec A and speech codec B.
  • Condition 2 A requirement imposed by the speech codec B on radio channel quality of a cell is lower than a requirement imposed by the speech codec A on the radio channel quality of the cell.
  • Condition 3 The video call service currently uses the speech codec A.
  • RSRP a requirement imposed by the EVS codec on RSRP of a cell is RSRP> ⁇ 120 dBm, and a requirement imposed by the AMR WB codec on the RSRP of the cell is RSRP> ⁇ 115 dBm.
  • the IMS core network device may add the first indication information to the service requirement information of the video call service, so that when the RSRP of the first cell does not satisfy the requirement imposed by the AMR WB on the RSRP of the cell, the eNB may send the first setup response to notify the IMS core network device, and accordingly the IMS core network device uses the EVS codec, thereby avoiding execution of single radio voice call continuity (SRVCC).
  • SSVCC single radio voice call continuity
  • the IMS core network device may add the second indication information or the third indication information to the service requirement information of the video call service, so that when the RSRP of the first cell does not satisfy the requirement imposed by the AMR WB on the RSRP of the cell, the eNB may directly execute SRVCC, and another cell provides a corresponding radio resource of the video call service for the UE.
  • the second cell or the third cell whose radio channel quality satisfies the service requirement of the video call service may not exist.
  • the method in this embodiment of this application may further include: if the eNB determines that the second cell or the third cell whose radio channel quality satisfies the service requirement of the video call service does not exist, sending, by the eNB, a second setup response to the IMS core network device; and receiving, by the IMS core network device, the second setup response from the eNB.
  • the eNB may refuse to allocate a radio resource to the video call service, and notify (by using the second setup response) the IMS core network device that the radio channel quality of the first cell does not satisfy the service requirement of the video call service and the second cell or the third cell whose radio channel quality satisfies the service requirement of the video call service does not exist.
  • the IMS core network device determines an updated service requirement of the video call service based on the received first setup response or second setup response.
  • the IMS core network device may determine the updated service requirement of the video call service based on “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the video call service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the video call service” carried in the first setup response or the second setup response.
  • a method for determining, by the IMS core network device, the updated service requirement of the video call service is similar to the method for determining, by the IMS core network device, the service requirement of the video call service, and details are not described in this embodiment of this application again.
  • the service requirement of the video call service includes the codec information of the video call service.
  • the video call service uses AMR-WB codec, a codec rating of the AMR-WB codec is 23.85 kbps, and a requirement imposed by the AMR-WB codec on the RSRP of the first cell is RSRP> ⁇ 115 dBm.
  • the IMS core network device may change a codec type of the video service to the EVS codec, adjust a codec rating to 13.2 kbps codec, and determine, based on an EVS codec scheme, that a requirement imposed by the EVS codec on the RSRP of the first cell is RSRP> ⁇ 120 dBm ( ⁇ 118 dBm).
  • the IMS core network device may send a service codec information adjustment notification message (to be specific, the second message) to the calling UE and the called UE after adjusting the codec information of the video call service.
  • the IMS core network device subsequently may change a codec scheme for the calling UE and the called UE.
  • the IMS core network device sends a second setup request of the video call service to the eNB.
  • a method for sending, by the IMS core network device, the second setup request of the video call service to the eNB is similar to the method for sending, by the IMS core network device, the first setup request of the video call service to the eNB, and details are not described in this embodiment of this application again.
  • FIG. 7A and FIG. 7B use an example in which updated RSRP is used as the updated service requirement of the video call service.
  • the eNB receives the second setup request from the IMS core network device, where the second setup request carries the updated service requirement of the video call service.
  • S 709 is: receiving, by the eNB, a create bearer request carrying the updated RSRP requirement.
  • the eNB may continue to perform S 705 , to be specific, determine whether the radio channel quality of the 4G network cell in which the UE is located satisfies the updated service requirement of the video call service, and perform a subsequent corresponding process.
  • the method in this embodiment of this application may further include S 710 and S 711 .
  • S 710 and S 711 refer to related content in this embodiment of this application, and details are not described herein again.
  • the IMS core network device may further terminate the video call service after receiving the first setup response or the second setup response.
  • the IMS core network device may terminate the video call service when determining that no further adjustment can be made to the service requirement of the video call service to enable the radio channel quality of the first cell to satisfy the service requirement of the video call service.
  • the IMS core network device may send a video call service deletion message to the calling UE when determining to terminate the video call service.
  • the deletion message may carry a specific reason value of terminating the video call service, for example, the radio channel quality of the first cell cannot satisfy the service requirement of the video call service.
  • the IMS core network device may negotiate with the calling UE to ask the calling UE whether the calling UE accepts current service experience and continue to retain the service. If the UE accepts the current service experience, the IMS core network device does not adjust the service requirement of the video call service or perform an operation of terminating the video call service, and may re-trigger a process of creating the dedicated bearer of the video call service to the EPC device and the eNB.
  • the IMS core network device does not send the service requirement of the video call service to the EPC device and the eNB, or the IMS core network device may send the service requirement of the video call service, and at the same time, indicate the eNB to: ignore the service requirement of the video call service when the eNB allocates a radio resource to the video call service.
  • the IMS core network device may deliver the service requirement of the video call service to the eNB.
  • the eNB may use the received service requirement of the video call service as an admission threshold of video call service setup.
  • the eNB may refuse to allocate a radio resource to the video call service, and at the same time, notify the IMS core network device, so that the IMS core network device makes a corresponding adjustment to the service requirement of the video call service, to complete video call service setup in this cell.
  • the eNB may hand over the UE to another 4G cell or 2G/3G cell that can satisfy the service requirement, to complete video call service setup in the another cell.
  • the foregoing embodiment describes, merely by using a video call service in a 4G network as an example, the service setup method provided in the embodiments of this application.
  • the service setup method provided in the embodiments of this application may be further applied to another service setup process in another network standard.
  • a network side may adaptively determine an admission threshold of service setup depending on service requirements of different services, thereby avoiding problems such as an error and inflexibility caused by determining an admission threshold only based on an empirical value.
  • the network side may adjust the service requirement depending on an actual network status, or hand over the UE to another cell, to ensure that after a service is set up, the service can be normally executed and user experience during the execution of the service is improved.
  • An embodiment of this application provides a service setup method. As shown in FIG. 8 , the service setup method includes the following steps.
  • a first service application server sends a first setup request to an access network device or a first core network device, where the first setup request carries a service requirement of a first service, and the service requirement of the first service is used to indicate, to the access network device, a radio channel quality requirement required for user equipment UE to execute the first service.
  • the access network device receives the first setup request from the first core network device or the first service application server.
  • the access network device sends a first setup response to the first core network device or the first service application server, where the first setup response is used to notify the first core network device or the first service application server that the access network device accepts the first setup request.
  • Radio channel quality of each cell in a network may change at any time.
  • the access network device sends the first setup response to the first core network device or the first service application server in S 803 , the radio channel quality of the first cell may not satisfy the service requirement of the first service.
  • the method in this embodiment of this application may further include S 804 .
  • the access network device determines that radio channel quality of a first cell of a first network in which the UE is located does not satisfy the service requirement of the first service.
  • the service requirement of the first service may include codec information of the first service and a codec information list of the UE.
  • the codec information list of the UE includes codec information supported by both the UE and the service application server.
  • the “determining, by the access network device, that radio channel quality of a first cell of a first network in which UE is located does not satisfy the service requirement of the first service” in S 804 may specifically include: determining, by the access network device, that the radio channel quality of the first cell satisfies radio channel quality required by at least one type of codec information in the codec information list of the UE but the radio channel quality of the first cell does not satisfy radio channel quality required by the codec information of the to-be-set up service.
  • any step of S 805 , S 806 , or S 807 may be performed.
  • the access network device sends a first notification message to the first core network device or the first service application server, where the first notification message is used to notify the first core network device or the first service application server that the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the first notification message carries at least one of the radio channel quality of the first cell, terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, load information of the first cell, RAT information of the first network, recommended codec information, and bandwidth information of the first service.
  • the access network device may determine the recommended codec information.
  • the recommended codec information may be codec information that is selected by the access network device from the codec information list of the UE and that is supported by both the UE and the service application server, and the recommended codec information is one piece of codec information in codec information supported by the first cell.
  • the first service application server receives the first notification message from the first core network device or the access network device.
  • the access network device hands over the UE to a second cell of the first network.
  • the access network device hands over the UE to a third cell of a second network.
  • the first network is the same as the first network in the foregoing embodiment
  • the second network is the same as the second network in the foregoing embodiment, and for detailed descriptions of the first network and the second network, refer to the related content in the foregoing embodiment.
  • the access network device because the first setup request received by the access network device carries the service requirement of the first service, after the access network device accepts the first setup request (to be specific, sends the first setup response to the service application server), if the radio channel quality of the cell in which the UE is located does not satisfy the service requirement of the first service, the access network device refuses to allocate a radio resource to the service, and at the same time, sends, to the service application server, the first notification message used to notify the service application server that “the radio channel quality of the first cell does not satisfy the service requirement of the first service”, or hands over the UE to another cell, to complete setup of the first service in the another cell.
  • a network side may adaptively determine an admission threshold (to be specific, a service requirement of a service) of service setup, thereby avoiding problems such as an error and inflexibility caused by determining an admission threshold only based on an empirical value.
  • the network side may adjust the service requirement depending on an actual network status, or hand over the UE to another cell, to ensure that after a service is set up, the service can be normally executed and user experience during the execution of the service is improved.
  • the first service application server may indicate, by using indication information included in the service requirement of the to-be-set up service, the access network device to: directly reply to the first service application server with the first notification message or hand over the UE to another cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service, to be specific, indicate the access network device to: determine to perform one of S 805 , S 807 , or S 808 when the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service.
  • S 805 in FIG. 8 may be replaced with S 805 ′
  • S 807 may be replaced with S 807 ′
  • S 808 may be replaced with S 808 ′.
  • the access network device If determining that the service requirement of the first service includes first indication information, the access network device sends a first notification message to the first core network device or the first service application server.
  • the first indication information is used to indicate the access network device to: send the first notification message to the first core network device or the first service application server when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the access network device determines that the service requirement of the first service includes second indication information and the access network device determines that a second cell whose radio channel quality satisfies the service requirement of the first service exists, the access network device hands over the UE to the second cell.
  • the second indication information is used to indicate the access network device to: hand over the UE to the second cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the access network device determines that the service requirement of the first service includes third indication information and the access network device determines that a third cell whose radio channel quality satisfies the service requirement of the first service exists, the access network device hands over the UE to the third cell.
  • the third indication information is used to indicate the access network device to: hand over the UE to the third cell when the radio channel quality of the first cell does not satisfy the service requirement of the first service.
  • the method in this embodiment of this application further includes S 809 .
  • the access network device determines that the radio channel quality of the first cell satisfies the service requirement of the first service.
  • a method for determining, by the access network device, that the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service exists is similar to the method for determining, by the access network device, that the second cell whose radio channel quality satisfies the service requirement of the to-be-set up service exists, and details are not described in this embodiment of this application again.
  • the method in this embodiment of this application further includes S 810 .
  • the access network device allocates a radio resource to the first service.
  • the method in this embodiment of this application may further include S 811 and S 812 .
  • the access network device determines that the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist, the access network device sends a second notification message to the first core network device or the first service application server.
  • the second notification message is used to notify the first core network device or the first service application server that the radio channel quality of the first cell does not satisfy the service requirement of the first service and the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist.
  • the second notification message carries at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the load information of the first cell, the RAT information of the first network, the recommended codec information, and the bandwidth information of the first service.
  • the first service application server receives the second notification message from the access network device or the first core network device.
  • the method in this embodiment of this application further includes S 813 .
  • the access network device determines that the second cell or the third cell whose radio channel quality satisfies the service requirement of the first service does not exist, the access network device deletes the radio resource allocated to the first service.
  • the first service application server may determine that the radio channel quality of the first cell does not satisfy the service requirement of the first service, and then send a first service modification request carrying an updated service requirement of the first service to the access network device.
  • the method in this embodiment of this application may further include the following steps:
  • the first service application server sends a first service modification request to the access network device or the first core network device, where the first service modification request carries an updated service requirement of the first service.
  • the access network device receives the first service modification request from the first core network device or the first service application server.
  • a method for receiving, by the access network device, the first service modification request from the first core network device or the first service application server is similar to the method for receiving, by the access network device, the first setup request from the core network device or the first service application server, and details are not described in this embodiment of this application again.
  • the access network device may determine whether the radio channel quality of the first cell satisfies the updated service requirement of the first service carried in the first service modification request. For a method for determining, by the access network device, whether the radio channel quality of the first cell satisfies the updated service requirement of the first service, refer to the method for determining, by the access network device, whether the radio channel quality of the first cell satisfies the service requirement of the to-be-set up service, and details are not described in this embodiment of this application again.
  • the first service is similar to the to-be-set up service in the foregoing embodiment
  • the codec information of the first service may be first codec information
  • updated codec information of the first service may be second codec information.
  • the first service application server may determine that the updated codec information of the first service is the second codec information, and change the codec information of the first service from the first codec information to the second codec information.
  • the first service application server may further send a second message to the UE, and the second message is used to indicate that the codec information of the first service is changed from the first codec information to the second codec information.
  • the first service application server may change the codec information of the first service from the first codec information to the second codec information when determining that a radio channel requirement corresponding to the first codec information is higher than a radio channel requirement corresponding to the second codec information, and send the second message to the UE.
  • the access network device may further receive a service setup request that is from another service application server and used to set up another service different from the first service.
  • the access network device may receive a second setup request from a second core network device or a second service application server.
  • the second setup request carries a service requirement of a second service, and the service requirement of the second service is used to indicate, to the access network device, a radio channel quality requirement required for the UE to execute the second service.
  • the access network device may deliver a second measurement control command to the UE.
  • the second measurement control command is used to indicate the UE to measure the radio channel quality of the first cell, and send a second measurement report to the access network device when the radio channel quality of the first cell does not satisfy the service requirement of the second service.
  • the second measurement report is used to indicate, to the access network device, that the radio channel quality of the first cell does not satisfy the service requirement of the second service.
  • the first service application server may further determine the service requirement of the first service before sending the first setup request carrying the service requirement of the first service to the access network device.
  • a method for determining, by the first service application server, the service requirement of the first service is similar to the method for “determining, by the service application server, the service requirement of the to-be-set up service” in the foregoing embodiment, and details are not described in this embodiment of this application again.
  • the first service application server may further obtain “at least one of the radio channel quality of the first cell, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the codec information of the to-be-set up service, the load information of the first cell, the RAT information of the first network, and the bandwidth information of the to-be-set up service” (briefly referred to as service requirement obtaining information) used to determine the service requirement of the first service.
  • service requirement obtaining information For a method for obtaining, by the first service application server, the service requirement obtaining information, refer to the related descriptions of S 501 to S 504 in the foregoing embodiment, and details are not described in this embodiment of this application again.
  • a method for determining, by the first service application server, the updated service requirement of the first service is similar to the method for “determining, by the service application server, the updated service requirement of the to-be-set up service” (to be specific, the related descriptions of S 601 to S 605 ) in the foregoing embodiment, and details are not described in this embodiment of this application again.
  • UE may be calling UE or called UE of a VoLTE service
  • an access network device may be an eNB corresponding to the calling UE or an eNB corresponding to the called UE
  • a service application server may be an IMS core network device (for example, P-CSCF ⁇ S-CSCF ⁇ an SCC AS ⁇ ATCF) corresponding to the calling UE or an IMS core network device corresponding to the called UE.
  • a service setup method provided in an embodiment of this application may include the following steps.
  • An IMS core network device receives a VoLTE service request message from calling UE, sets up a video session for the calling UE and called UE, and performs service requirement (for example, codec information) negotiation.
  • service requirement for example, codec information
  • the IMS core network device determines a service requirement of a VoLTE service based on at least one of a MOS requirement of the VoLTE service, radio channel quality of a cell in which UE is located, terminal type information of the UE, information about a carrier frequency accessed by the UE, location information of the UE, codec information of a video call service, load information of the cell in which the UE is located, RAT information of the cell in which the UE is located, and bandwidth information of the video call service.
  • the IMS core network device sends a first setup request of the VoLTE service to an eNB, to trigger the eNB to allocate a radio resource to the VoLTE service, where the first setup request carries the service requirement of the VoLTE service.
  • the eNB receives the first setup request of the VoLTE service.
  • S 1104 may be specifically: receiving, by the eNB, a create bearer request carrying an RSRP requirement of the VoLTE service.
  • the eNB determines that radio channel quality of a 4G network cell in which the UE is located satisfies the service requirement of the VoLTE service.
  • a method for determining, by the eNB, that the radio channel quality of the 4G network cell in which the UE is located satisfies the service requirement of the video call service refer to the method for determining, by the eNB, whether the radio channel quality of the 4G network cell in which the UE is located satisfies the service requirement of the video call service in the foregoing embodiment, and details are not described in this embodiment of this application again.
  • the eNB allocates a radio resource to the VoLTE service.
  • the eNB sends a first setup response to the IMS core network device.
  • the first setup response is used to notify the IMS core network device that the access network device accepts the first setup request.
  • FIG. 11A and FIG. 11B show a specific manner of sending, by the eNB, the first setup response to the IMS core network device in an implementation of this embodiment of this application.
  • the specific manner of sending, by the eNB, the first setup response to the IMS core network device in FIG. 11A and FIG. 11B refer to the related descriptions of S 706 in the foregoing embodiment, and details are not described in this embodiment of this application again.
  • a create bearer response, a CCR message, an RAR message, or an ASR message shown in FIG. 11A and FIG. 11B does not carry “indication information indicating that the eNB cannot provide radio channel quality indicated by the service requirement of the video call service”, but carries “indication information indicating that the eNB accepts the first setup request (to be specific, the service setup request of the VoLTE service)” or “indication information indicating that a radio resource is successfully reserved”.
  • the eNB may further send the first setup response to the IMS core network device by using an interface between the eNB and the IMS core network device or by using a user plane data packet.
  • a method for sending, by the eNB, the first setup response to the IMS core network device by using the interface between the eNB and the IMS core network device or by using the user plane data packet refer to the related descriptions of S 706 in the foregoing embodiment, and details are not described in this embodiment of this application again.
  • radio channel quality of each cell in a network may change at any time, after S 1107 , the radio channel quality of the 4G network cell in which the UE is located may change, and changed radio channel quality does not satisfy the service requirement of the VoLTE service.
  • the method in this embodiment of this application may further include the following steps.
  • the eNB determines that the radio channel quality of the 4G network cell in which the UE is located does not satisfy the service requirement of the VoLTE service.
  • the eNB If determining that the service requirement of the VoLTE service includes first indication information, the eNB sends a first notification message to the IMS core network device.
  • the first notification message is used to notify the IMS core network device that the radio channel quality of the 4G network cell in which the UE is located does not satisfy the service requirement of the VoLTE service.
  • the first notification message carries at least one of the radio channel quality of the 4G network cell (to be specific, the first cell) in which the UE is located, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the load information of the 4G network cell in which the UE is located, RAT information of a 4G network in which the UE is located, and the bandwidth information of the VoLTE service.
  • the first notification message in this embodiment of this application may be a new message temporarily not defined in a standard.
  • a specific method for sending, by the eNB, the first notification message to the IMS core network device in S 1109 refer to the specific method for sending, by the eNB, the first setup response to the IMS core network device in S 706 in the foregoing embodiment, and details are not described in this embodiment of this application again.
  • the eNB may further directly send the first notification message to the IMS core network device by using the interface between the eNB and the IMS core network device.
  • the eNB may send the first notification message to the IMS core network device by using the user plane data packet.
  • the method in this embodiment of this application may further include:
  • the eNB determines that the service requirement of the VoLTE service includes second indication information, and the eNB determines that a second cell whose radio channel quality satisfies the service requirement of the VoLTE service exists, handing over, by the eNB, the UE to the second cell; or
  • the eNB determines that the service requirement of the VoLTE service includes third indication information, and the eNB determines that a third cell whose radio channel quality satisfies the service requirement of the VoLTE service exists, handing over, by the eNB, the UE to the third cell.
  • the second cell or the third cell whose radio channel quality satisfies the service requirement of the VoLTE service may not exist.
  • the method in this embodiment of this application may further include: if the eNB determines that the second cell or the third cell whose radio channel quality satisfies the service requirement of the VoLTE service does not exist, sending, by the eNB, a second notification message to the IMS core network device; and receiving, by the IMS core network device, the second notification message from the eNB.
  • the second notification message is used to notify the IMS core network device that the radio channel quality of the first cell does not satisfy the service requirement of the VoLTE service and the second cell or the third cell whose radio channel quality satisfies the service requirement of the VoLTE service does not exist.
  • the second notification message carries at least one of the radio channel quality of the 4G network cell (to be specific, the first cell) in which the UE is located, the terminal type information of the UE, the information about the carrier frequency accessed by the UE, the location information of the UE, the load information of the 4G network cell in which the UE is located, the RAT information of the 4G network in which the UE is located, and the bandwidth information of the VoLTE service.
  • the IMS core network device determines an updated service requirement of the VoLTE service based on the received first notification message or a received second notification message.
  • the IMS core network device sends a first service modification request of the VoLTE service to the eNB, where the first service modification request carries the updated service requirement of the VoLTE service.
  • FIG. 11A and FIG. 11B for a specific method for sending, by the IMS core network device, the first service modification request of the VoLTE service to the eNB in S 1111 , refer to the specific method for sending, by the IMS core network device, the second setup request of the video call service to the eNB in S 708 in the foregoing embodiment, and details are not described in this embodiment of this application again.
  • the eNB receives the first service modification request from the IMS core network device.
  • the receiving, by the eNB, the first service modification request from the IMS core network device may be specifically: receiving a create bearer request carrying an updated RSRP requirement.
  • the eNB may continue to determine whether the radio channel quality of the 4G network cell in which the UE is located satisfies the updated service requirement of the VoLTE service, and perform a subsequent corresponding process. As shown in FIG. 11A and FIG. 11B , the method in this embodiment of this application may further include S 1112 and a subsequent operation. After S 1112 , the eNB may determine whether the radio channel quality of the 4G network cell in which the UE is located satisfies the updated service requirement of the VoLTE service carried in the first service modification request.
  • the IMS core network device may terminate the VoLTE service after receiving the first notification message or the second notification message.
  • a method for terminating, by the IMS core network device, the VoLTE service based on the first notification message or the second notification message refer to the method for terminating, by the IMS core network device, the video call service based on the first setup response or the second setup response in the foregoing embodiment 2, and details are not described in this embodiment of this application again.
  • the IMS core network device may deliver the service requirement of the VoLTE service to the eNB.
  • the eNB may receive the service setup request carrying the service requirement of the VoLTE service.
  • the eNB may use the received service requirement of the VoLTE service as an admission threshold of VoLTE service setup.
  • the eNB may refuse to allocate the radio resource to the VoLTE service, and at the same time, notify the IMS core network device, so that the IMS core network device makes a corresponding adjustment to the service requirement of the VoLTE service, to complete VoLTE service setup in this cell.
  • the eNB may hand over the UE to another 4G cell or 2G/3G cell that can satisfy the service requirement, to complete VoLTE service setup in the another cell.
  • a network side may adaptively determine an admission threshold of service setup depending on a requirement, thereby avoiding prior-art problems such as an error and inflexibility caused by determining an admission threshold only based on an empirical value.
  • the network side may adjust the service requirement depending on an actual network status, or hand over the UE to another cell, to ensure that after a service is set up, the service can be normally executed and user experience during the execution of the service is improved.
  • the IMS core network device (marked as an IMS core network device 1 , which may be the first service application server in the foregoing embodiment) responsible for the VoLTE service, and the called UE, the calling UE may save, as a measurement report threshold, the service requirement of the VoLTE service delivered by the IMS core network device responsible for the VoLTE service.
  • an IMS core network device responsible for a second service (for example, a video call service) is marked as an IMS core network device 2 , to be specific, may be the second service application server in the foregoing embodiment.
  • the VoLTE service is the first service in the foregoing embodiment
  • the video call service is the second service in the foregoing embodiment.
  • the method in this embodiment of this application may further include S 1201 .
  • the IMS core network device 2 sends a second setup request to the eNB, to trigger the eNB to allocate a radio resource to a video call service, where the second setup request carries a service requirement of the video call service.
  • the eNB receives the second setup request from the IMS core network device 2 .
  • the eNB determines that the service requirement of the VoLTE service is lower than the service requirement of the video call service.
  • the eNB may directly compare the RSRP requirement of the VoLTE service with an RSRP requirement of the video call service. Assuming that the RSRP requirement of the VoLTE service is ⁇ 115 dBm, and the RSRP requirement of the video call service is ⁇ 110 dBm, the eNB determines that the service requirement of the VoLTE service is lower than the service requirement of the video call service.
  • the eNB may first map the SINR requirement of the video call service into an RSRP requirement (for example, ⁇ 110 dBm), or may first map the RSRP requirement of the VoLTE service into an SINR requirement (for example, 2 dBm), and then perform comparison.
  • the eNB determines that the radio channel quality of the 4G cell in which the UE is currently located cannot satisfy the service requirement of the video call service.
  • the eNB may compare the service requirements of the two services, and select a higher service requirement, for example, the service requirement of the video call service, as the measurement report threshold of the UE.
  • a service requirement of a current service for example, the video call service
  • the downlink radio channel quality of the cell in which the UE is located can satisfy the service requirement of the VoLTE service, ensuring normal execution of the VoLTE service, and ensuring voice call quality.
  • the IMS core network device may further update the service requirement of the VoLTE service in real time.
  • parameters affecting the service requirement of the VoLTE service include but are not limited to the radio channel quality (for example, RSRP, RSRQ, or an SINR) of the 4G network cell in which the UE is located, a location of the UE, the information about the carrier frequency accessed by the UE, time information, the load information of the 4G network cell in which the UE is located, codec information of the VoLTE service, and the bandwidth information of the VoLTE service.
  • the IMS core network device may update the service requirement of the VoLTE service in real time based on changes of the parameters. Before updating the service requirement of the VoLTE service in real time, the IMS core network device may obtain, from the UE, the parameters affecting the service requirement of the VoLTE service.
  • the IMS core network device may further deliver different service requirements to the eNB for the VoLTE service in different time periods. For example, an RSRP requirement delivered in a busy time (for example, when there is a large quantity of users in the daytime) may be ⁇ 110 dBm, and an RSRP requirement delivered in an idle time (when there is a small quantity of users at night) may be ⁇ 120 dBm. If the IMS core network device detects that the time information changes from the busy time to the idle time, the IMS core network device may determine that the RSRP requirement may be updated from ⁇ 110 dBm to ⁇ 120 dBm.
  • the IMS core network device may update the service requirement of the VoLTE service to a service requirement corresponding to current codec information when codec information negotiated about between the calling UE, the IMS core network device, and the called UE changes.
  • the IMS core network device may update the service requirement of the VoLTE service in real time based on a change of the MOS of the VoLTE service. For example, a current MOS of the VoLTE service is 3.5, and is lower than a preset value 4 of the MOS requirement of the VoLTE service. Then, the IMS core network device may update the service requirement of the VoLTE service to a service requirement corresponding to the MOS of 3.5.
  • the service requirement of the VoLTE service may be updated in real time, to ensure normal execution of the VoLTE service, and ensure the voice call quality.
  • the access network device and the service application server include hardware structures and/or software modules corresponding to the functions.
  • the access network device, the service application server, and algorithm steps in the examples described with reference to the embodiments disclosed in this specification can be implemented by hardware or a combination of hardware and computer software in this application. Whether a function is performed by hardware or by computer software driving hardware depends on a particular application and a design constraint condition of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but it should not be considered that the implementation goes beyond the scope of this application.
  • module or unit division may be performed on the access network device or the service application server based on the examples of the methods. For example, each module or unit may be obtained through division for each corresponding function, or at least two functions may be integrated into one processing module.
  • the module or unit division in the embodiments of this application is an example, and is merely a logical function division, and there may be another division manner during actual implementation.
  • FIG. 12 is a possible schematic structural diagram of the access network device used in the foregoing embodiment.
  • the access network device 1200 includes a receiving module 1201 , a determining module 1202 , a sending module 1203 , and a handover module 1204 .
  • the receiving module 1201 is configured to receive a request message or another type of message from devices such as a service application server, a core network device, and UE.
  • the receiving module 1201 is configured to support S 302 in any one of FIG. 3 to FIG. 6 , S 311 in FIGS. 6 , S 704 and S 709 in FIG. 7A and FIG. 7B , S 802 in any one of FIG. 8 to FIGS. 10 , S 1104 and S 1112 in FIG. 11A and FIG.
  • the determining module 1202 is configured to determine whether radio channel quality of a first cell of a first network in which the UE is located satisfies a service requirement of a to-be-set up service. For example, the determining module 1202 is configured to support S 303 in any one of FIG. 3 to FIGS. 6 , S 705 and S 710 in FIG. 7A and FIG. 7B , S 804 in any one of FIG. 8 to FIGS. 10 , S 1105 and S 1108 in FIG. 11A and FIG. 11B , and/or other processes of the technology described in this specification.
  • the sending module 1203 is configured to send a response message, a query message, or another type of message to the devices such as the service application server, the core network device, and the UE.
  • the sending module 1203 is configured to support S 304 in FIG. 3 , S 304 ′ in any one of FIG. 4 to FIG. 6 , S 308 in FIG. 5 or FIGS. 6 , S 706 and S 711 in FIG. 7A and FIG. 7B , S 803 and S 805 in FIGS. 8 , S 803 and S 805 ′ in FIG. 9 , S 803 , S 811 , and S 805 ′ in FIGS. 10 , S 1107 and S 1109 in FIG. 11A and FIG.
  • the handover module 1204 is configured to hand over the UE between cells when the determining module 1202 determines that the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service.
  • the handover module 1204 is configured to support S 306 and S 307 in FIG. 3 , S 306 ′ and S 307 ′ in any one of FIG. 4 to FIGS. 6 , S 807 and S 808 in FIG. 8 , S 807 ′ and S 808 ′ in FIG. 9 or FIG. 10 , and/or other processes of the technology described in this specification.
  • the access network device 1200 includes but is not limited to the foregoing listed function modules.
  • the access network device 1200 may further include: an allocation module, configured to allocate a radio resource to the UE when the determining module 1202 determines that the radio channel quality of the first cell satisfies the service requirement of the to-be-set up service; a deletion module, configured to: when the determining module 1202 determines that the radio channel quality of the first cell does not satisfy the service requirement of the to-be-set up service, delete the radio resource allocated by the allocation module to the UE; and the like.
  • functions that the foregoing function modules can specifically implement include but are not limited to the functions corresponding to the steps in the methods described in the foregoing examples.
  • function units of the access network device 1200 and detailed descriptions of each function unit of the access network device 1200 refer to the detailed descriptions of the steps in the corresponding methods, and details are not described in this embodiment of this application again.
  • the modules may be implemented by using hardware, or may be implemented by using software function modules or function units.
  • the processing unit may be a processor or a controller, for example, may be a CPU, a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or another programmable logic device, a transistor logic device, a hardware component, or any combination thereof.
  • the processor or controller may implement or execute logical block diagrams, modules, and circuits of the examples described with reference to the content disclosed in this application.
  • the processing unit may be a combination implementing a computing function, for example, a combination including one or more microprocessors, or a combination of a DSP and a microprocessor.
  • the receiving module 1201 and the sending module 1203 may be integrated into one communications unit for implementation.
  • the communications unit may be a communications interface, a transceiver circuit, a transceiver, or the like.
  • the access network device 1200 in this embodiment of this application may be an access network device 1300 shown in FIG. 13 .
  • the access network device 1300 includes one or more processors 1301 , a transceiver 1302 , a memory 1303 , and a bus 1304 .
  • the processor 1301 , the transceiver 1302 , and the memory 1303 are connected by using the bus 1304 .
  • the memory is configured to store one or more application programs.
  • the one or more application programs include an instruction.
  • the access network device 1300 executes the instruction, the access network device 1300 performs steps in the related method in any one of FIG. 3 to FIG. 11A and FIG. 11B , and implements the service setup method in the foregoing embodiment by interacting with a device such as a service application server.
  • the bus 1304 may be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, or the like.
  • the bus 1304 may be classified into an address bus, a data bus, a control bus, and the like.
  • the bus is represented in FIG. 13 by using only one bold line, but it does not indicate that there is only one bus or only one type of bus.
  • An embodiment of this application further provides a non-volatile storage medium.
  • the non-volatile storage medium stores one or more pieces of program code.
  • the access network device 1300 executes the program code, the access network device 1300 performs the steps in the related method in any one of FIG. 4 to FIG. 11A and FIG. 11B , and implements the service setup method in the foregoing embodiment by interacting the device such as a service application server.
  • FIG. 14 is a possible schematic structural diagram of the service application server used in the foregoing embodiment.
  • the service application server 1400 includes a sending module 1401 and a receiving module 1402 .
  • the sending module 1401 is configured to send a request message or another type of message to devices such as an access network device, a core network device, and UE.
  • the sending module 1401 is configured to support S 301 in any one of FIG. 3 to FIG. 6 , S 310 in FIGS. 6 , S 703 and S 708 in FIG. 7A and FIG. 7B , S 801 in any one of FIG. 8 to FIGS. 10 , S 1103 and S 1111 in FIG. 11A and FIG. 11B , and/or other processes of the technology described in this specification.
  • the receiving module 1402 is configured to receive a response message, a query message, or another type of message from the devices such as the access network device, the core network device, and the UE.
  • the receiving module 1402 is configured to support S 305 in any one of FIG. 3 to FIG. 6 , S 309 in FIG. 5 or FIG. 6 , S 707 in FIG. 7A and FIG. 7B , S 806 in any one of FIG. 8 to FIG. 10 , S 812 in FIGS. 10 , S 1107 and S 1109 in FIG. 11A and FIG. 11B , and/or other processes of the technology described in this specification.
  • the service application server 1400 may further include a determining module 1403 .
  • the determining module 1403 is configured to determine a service requirement of a to-be-set up service or an updated service requirement of a to-be-set up service.
  • the determining module 1403 is configured to support S 702 and S 707 in FIG. 7A and FIG. 7B , S 1102 and S 1110 in FIG. 11A and FIG. 11B , and/or other processes of the technology described in this specification.
  • the receiving module 1402 may be further configured to receive related information used by the determining module 1403 to determine the service requirement of the to-be-set up service or the updated service requirement of the to-be-set up service.
  • the service application server 1400 includes but is not limited to the foregoing listed function modules.
  • the service application server 1400 may further include a change module, configured to change codec information.
  • functions that the foregoing function modules can specifically implement include but are not limited to the functions corresponding to the steps in the methods described in the foregoing examples.
  • function units of the service application server 1400 and detailed descriptions of each function unit of the service application server 1400 refer to the detailed descriptions of the steps in the corresponding methods, and details are not described in this embodiment of this application again.
  • the processing unit may be a processor or a controller, for example, may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA or another programmable logic device, a transistor logic device, a hardware component, or any combination thereof.
  • the processor or controller may implement or execute logical block diagrams, modules, and circuits of the examples described with reference to the content disclosed in this application.
  • the processing unit may be a combination implementing a computing function, for example, a combination including one or more microprocessors, or a combination of a DSP and a microprocessor.
  • the sending module 1401 and the receiving module 1402 may be integrated into one communications unit for implementation.
  • the communications unit may be a communications interface, a transceiver circuit, a transceiver, or the like.
  • the service application server 1400 in this embodiment of this application may be a service application server 1600 shown in FIG. 16 .
  • the service application server 1600 includes one or more processors 1601 , a transceiver 1602 , a memory 1603 , and a bus 1604 .
  • the processor 1601 , the transceiver 1602 , and the memory 1603 are connected by using the bus 1604 .
  • the memory is configured to store one or more application programs.
  • the one or more application programs include an instruction.
  • the service application server 1600 executes the instruction, the service application server 1600 performs the steps in the related method in any one of FIG. 3 to FIG. 11A and FIG. 11B , and implements the service setup method in the foregoing embodiment by interacting with a device such as a service application server.
  • the bus 1604 may be a PCI bus, an EISA bus, or the like.
  • the bus 1604 may be classified into an address bus, a data bus, a control bus, and the like.
  • the bus is represented in FIG. 16 by using only one bold line, but it does not indicate that there is only one bus or only one type of bus.
  • An embodiment of this application further provides a non-volatile storage medium.
  • the non-volatile storage medium stores one or more pieces of program code.
  • the service application server 1600 executes the program code, the service application server 1600 performs the steps in the related method in any one of FIG. 4 to FIG. 11A and FIG. 11B , and implements the service setup method in the foregoing embodiment by interacting with a device such as a service application server.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the described apparatus embodiment is merely an example.
  • the module or unit division is merely logical function division and may be other division in actual implementation.
  • a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed.
  • the shown or discussed mutual couplings or direct couplings or communication connections may be implemented by using some interfaces.
  • the indirect couplings or communication connections between the apparatuses or units may be implemented in electrical, mechanical, or other forms.
  • the units described as separate parts may or may not be physically separate, and parts shown as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual requirements to achieve the objectives of the solutions of the embodiments.
  • function units in the embodiments of this application may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units may be integrated into one unit.
  • the integrated unit may be implemented in a form of hardware, or may be implemented in a form of a software function unit.
  • the integrated unit When the integrated unit is implemented in the form of a software function unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of this application essentially, or the part contributing to the prior art, or all or some of the technical solutions may be implemented in a form of a software product.
  • the computer software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor to perform all or some of the steps of the methods described in the embodiments of this application.
  • the foregoing storage medium includes any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc.

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